Operation technology for electric furnace converter

Abstract

The invention discloses an operation technology for an electric furnace converter. A furnace burden structure containing 85-95% of molten iron and 5-15% of steel scrap is adopted; after a furnace lid of an electric furnace is opened, the steel scrap is added at one time through a material basket; molten iron is continuously blended at a speed of 2.0-4.0 tons per minute by utilizing an iron blending device, and meanwhile, an oxygen flow is jetted into the furnace through three furnace-wall praxair carbon oxygen guns which are mounted on the furnace wall; the oxygen supply strength is adjusted according to a blowing condition in the furnace and the carbon content in the furnace stabilized at 0.40-0.80% is ensured; lime, return mine and limestone are added while oxygen is blown; slagging is performed and temperature of the molten steel in the furnace is adjusted; during a blowing process, the temperature of the molten steel in the electric furnace is controlled within a range of 1500 DEGC to 1560 DEG C and the stability of carbon oxygen reaction in the furnace is ensured; and the temperature of the molten steel is controlled within the range of 1600 DEG C to 1650 DEG C at end point of the electric furnace, thereby finishing electric furnace smelting. According to the operation technology provided by the invention, the problems of serious splashing and difficulty in dephosphorization of electric furnace converter production are solved, the splashing is light, the time of electric furnace smelting is short, and energy conservation and cost reduction are realized.

Description

technical field [0001] The invention belongs to the field of metallurgy, and relates to an operating process of an electric furnace, in particular to an operating process of converting an electric furnace into a converter that can reduce power consumption and electrode consumption. Background technique [0002] At present, the electric furnace steelmaking plant adopts a furnace charge structure of 60-40% scrap steel and 40-60% molten iron. While supplying oxygen to the furnace through the molar oxygen lance and three furnace wall jet oxygen lances, the electric furnace is supplied to the electric furnace through the power supply system. When electrified for smelting, the smelting power consumption is as high as 225kwh / t, and the electrode consumption is as high as 1.2kg / t, so the production cost of electric furnace is much higher than that of converter smelting. [0003] In the conventional ultra-high power electric arc furnace type, the furnace cover is opened to directly a...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems existing in the original electric converter operation process, the object of the present invention is to provide an electric furnace conversion operation process, which solves the problems of severe splatter and difficult dephosphorization in the production , the electric furnace smelting time is short, realizing energy saving and cost reduction

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